Air cooled furnace structure



pcf. 25,1927; ir@

F. H. wArrE ET AL AIR GOOLED FURNCE STRUCTURE Filed March 5l, 1925 2 Sheets-Sheet l F. H. WAH-E ET AL AI COOLED FURNACE STRUCTURE 2Fagled Marh 31. 1923 2 sheets-sheet 2 Hummm-7 ffy/'21455555 Patented Uct. 25, 1927,

lhllllqllf STATES critica.,

FRANK H. WAITE AND GEORGE W. DAVEY, OF LONG ISLAND CTY, NEW' YORK.

AIR-COOLED FRNACE STRUCTURE.

p Application led March 31, 1923. Serial No. 629,186.

This invention relates to novel means by which air is permitted to circulate through the sidewalls of the furnace to cool the same and then drawn under and through the grate for facilitating the ,thorough burning of the fuel.

A further object of the invention is to provide means for forming a draft through the side walls ofthe furnace and grate, the draft causing the air to flow through the grate with considerable velocity, thereby insuring a complete circulation throughthe side Walls and grate.

A further 'object of the invention is to provide means for circulating air through the vside Walls of a' furnace to cool the side Vwalls and then use the heated air from the side walls for the grate, to cause a complete combustion of the fuel.

still further object of the invention is to provide an improved furnace attachment embodying side ivalls formed of blocks hav section through a furnace constructed in ac-A cordance with this invention.

Figure 2 is transverse section through the furnace constructed in accordance with this inventio-n, showing the grate diagraminatically.

' Figure 3 is an enlarged fragmentary transverse section through one side ivall of the furnace, showing a modified form of means for permitting the air to be taken from the side Walls and forced into the grate.

Referring to the drawings in detail, Wherein similar reference characters designate corresponding parts throughout the several views, the letter A generally indicates a fur-v nace, B the side Walls thereof, and C the grate. K

The side Walls B of the furnace are constructed in the same manner as the side Walls of the furnace in our pending application tiled July'S, 1921, Serial No. 483,220, and therefore a detailed description thereof is deemed unnecessary, but as shown, the same consists of a facing. of a plurality of blocks 5, having air passageways 6 extending therethrough which communicate with one another. As shown these passageways in the brick. open out as at 7, on each side of the furnace, which forms an air vinlet therefor.

The grate .C is of the same type, as used in the J ones A.. C. stoker and the same -is provided with a plurality of air outlet openings, through which, in my invention, the air from the side Walls B of the furnace A is adapted to flow.

The side Walls of the furnace are provided with air outlet openings 8,'Which communicate with the passageways in the brick 5, at a point spaced from the air inlet 7 and in the preferred embodiment of our invention, iveutilize an air conduit pipe, 1vliich extends entirely across the grate and into the air outlet openings 8. The terminals of the pipe 9 can be provided with upturned ends or elbows 10, which vextend into the passage- Ways of the blocks or bricks 5. If so desired a suitable packing or the like 11 can be placed around said upturned ends or elbows 10. The pipe 9 at spaced points can be provided with upstanding nipples or the like 12 which can terminate directly in the grate C.

It is obvious that Whether the furnace is of the natural or force draft type, a complete circulation Will be. had through the Walls B and pipe 9. The air will be sucked out of the nipples 12 by the draft thus causing the sucking of air into the Walls B through the air inlet openings 7 and this air Will. circulate entirely through the blocks and then into the pipe 9.

ln case there is some obstruction in the furnace which would prevent the pipe 9 from extending` from one side Wall to the other, We utilize a relatively short pipe 15 for each side Wall, and as shown the inner ends of these pipes are provided with upstanding nipples 16, which can be provided with perforated caps or nozzles 17. The outer ends of these short pipes 15 extend into the Walls B and have angled ends 18 which conimunicate with the passageways 6 in the blocks 5.

From the foregoing description, it can be seen that We have provided an improved means for insuring a positive circulation of Sii air through the side walls of the furnace and the utilizing oit this air as a means orfacilitating the burning of the fuel and the combustion of all gases arising therefrom.

Changes in details may be made without departing from the spirit or the scope of this invention.

lhat we claim as new is:

l, In a furnace, side walls constructed of blocks having air passageways extending in two directions therethrough, a grate between said walls, an air inlet and an air outlet communicating with the passageways ot each wall, and a. duct located below and transversely of the grate, having upstanding nipples termed therewith, the ends ot the said duct terminating` in the air passageways within the walls.

Q. In a furnace, comprising side walls constructed of superimposed blocks having vertical and longitudinal communicating air passageways therethrough, an air inlet and au air outlet communicating with the said passageways, a grate between the side walls, a transversely extending duct connecting the lower passageways in each wall located below the grate and having nipples extending into the grate communicating with the duct, the ends of said duct terminating in elbows within the lower vertical passageways within the walls.

n 3. In a furnace, side walls constructed ot blocks having communicating air passageways therethrough, an air inlet passageway formed in each wall at the lower end thereof communicating with the passageway in the blocks, an air outlet passageway formed in each wall communicating with the air passageway in the blocks, arranged in spaced relation to the inlet ways, a perforated grate arranged. between the side walls, a pipe extending below and transversely oit the grate communicating with the air outlet passageways, and upstanding nipples extending into the grate and communicating with said transversely extending pipe.

l. In a 'furnace structure, the combina-v tion oil side walls constructed ot blocks having connuunicating air passages therethrough, an air 'inlet formed .ineach wall at the lower end thereo'l conin'iunicating with the passages in the blocks,y an air outlet :termed in each wall communicating with the air passages in the blocks and arranged in spaced relation to the inlet in `said wall, a perforated grate arranged between the walls, air conducting means extending from the walls, below and transversely of the grate, communicating with said air Outlets, and nipples extending upward under said grate and connnunicating with said air conducting means.

In testimony whereof we atlix our sig- 

